1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff8d20f4573b26ce85daa629a0b357fe1b19c43f798b60faf2a942961f72383. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed027e3a-77f9-4aaf-932d-0d89d4f8e056.json and https://artists.proofprofile.net/proofs/artist/ed027e3a-77f9-4aaf-932d-0d89d4f8e056.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5266d49486a4cd629098fc7bf24de921870c346095b2e3db7fb227a118aec4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKE022373001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08328c7d7c79b355a908e80e1fce64e04fbe67e0d2ed6fc1123f5a7113df968f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKE022372591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685507bb28253d1f292cc8884a1f82b2c111f325f343847982edc493df6ba5dc. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKE022372982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a916e9254fac84ef9cc4101b79c8f501071b9f3e5f463607b327f12d237b0a7. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKE022372984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a17a34a7fac1f698de98bc85ad0b07cff0a9beb3c265be542019d722375c09. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKE022372985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbd0e500b2edc0943ea6c8b0748a74362cfdc6bb97eefac4fdc447cdb686ef0. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKE022372988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1faab3f773a64137fa33f8eec3120399e708af1335cf7bc2d540dc458bc858db. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKE022372990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419cd2867603ef9ec452b205ee5ac52f356db6b952fe596d9377dd5cba83d8bd. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKE022372991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ab08c7bd390c3139e3caebdbd1e512496efe36d1b47d1dcddf614b6c56081e. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKE022372519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca12098a99a6ad4bc47f0cdb78884dd088115c792ffd1e03b83cfc31ab64c20. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKE022372520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80306c8928ac1459e538411b4e0ef8c38309924092e3a34019c3893d402bc573. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKE022372521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b5a95825eb52b04cd1d024226c1999c2f2a8e36245dd554c5de8f033c81572. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKE022373070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5cf53d3315d625a4750c488f44981eadcbfaf0828244f275255071673873e92. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKE022373071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727368828f13cf8cf7f81f241c667366c21e69774e4d637750c150f85bbbd6fb. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKE022373075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7ed5038464f65533c9246709fa7e00f0270ef7f639d98615442d8302f51745. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKE022373078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a089ce56be2e57f9384fc74b31b1ddfd64f9c85cd563393d554a6c6619c370. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKE022373050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95e6442254974d40b030ec8072b5c673d86af5c7d0da80ce16347cb5da769dd. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKE022373051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406cec773dad8bd21b4590f5a4281550adc1105d505f87efc8e633cd9eb2f87e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKE022373052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a475d7eae29436ebf046771ea77afda7f7a6771fc1b053b4c27fbb6b478ea31. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKE022373053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff3d2e6da10f23cbbe5506e4557b9ae64abee5a7fd859d12f6b908a70c27ba1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKE022373054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc5561c2812006416fb217d479ae04d17cdd2f0ea583d6817b0ca5b5e7bd619. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKE022373055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d74e86f6e9cb6cadad0da3763ac6b7c77e220e6ac83a468a5c3bb4d69023ac. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKE022373056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b20531bb6cab27fa6efcee1f08f367948cba1873e7e720a0601de5aa01cb887. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKE022373057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bdbe5afbaaa37d42c507b7d5cd5ac3db41afa27fd3a0d6b6560b013fe82bdd6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKE022373058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c0f02a01fa586a11119decf7b2c302438ed8fd652b2543762ce20a447e8432. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKE022373059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3cc4dc9ddf06321c9a6f4f0712f118dfa389e4bafafbd14414b9c83325f587. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKE022373533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48436d4e0da9cdb1bdc92d59e0f4ab61c4d6db569fdf4f6cdb492feb0897e5de. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKE022373535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad30dcaffb555411cb2e1cadf920cbebb4f53fc1b64be498a59e55ad3fdadd6d. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKE022373539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3952305bf57f2b93ec2346362003359589163b5a339a74a25d973adc746bf224. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKE022373012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f6f9450e37eeb2ec71e373802346aab6a3be9c3098d5d82e907e1866d34917. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKE022373019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb36b82c2eac89e53f0aa99f0ead9b10ccb5f47f2349e42dc2174e070109f01. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKE022373020.